Key FOB red "panic button" cover

The little red panic button cover on one of my key FOBS turned up missing yesterday. I have no idea how or where it popped off, but if it was inside the car, I may have vacuumed it up at the car wash. The panic button itself still works by pressing it with a fingernail, but would really like to find a replacement for that little red button cover. Any ideas? Thanks.

 

Thanks for the tip nh70. The teeny little red button cover actually turned up in the driveway today. Now I'm wondering whether or not to put it back on the fob.

Yesterday I did a thorough search for one of those little buttons and they don't seem to be available anywhere. There is a company that makes them for the German made cars, but that's about it. An enterprising person could probably make and sell them for Prii if that happens to be a common occurrence.